MAX3540(2007) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX3540 Datasheet PDF : 16 Pages
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Complete Single-Conversion Television Tuner
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3540 Evaluation Kit, VCC = +3.1V to +3.5V, 75Ω system impedance, default register settings, VRFAGC = VIFAGC = +3V (minimum
attenuation), TA = 0°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IF VARIABLE-GAIN AMPLIFIER
Input Impedance
Output Impedance
Balanced
Balanced (Note 1)
2000
Ω
300
Ω
Passband Voltage Gain
Passband Gain Flatness
Source load = 300Ω,
output load = 300Ω
Maximum gain setting,
VIFAGC = 3V
Minimum gain setting,
VIFAGC = 0.5V
40MHz to 48MHz (Note 1)
54
56
65
dB
21
1.2
dB
Output Voltage
AGC Gain Slope
Equivalent Input Voltage
Noise Density
VIFAGC = 3V (Note 1)
VIFAGC = 3V to 0.5V (Note 1)
At 44MHz, maximum gain, VIFAGC = 3V (Note 1)
2
VP-P
30
dB/V
7.3 nV/√Hz
Noise Figure Change vs.
Attenuation
< 0.35
dB/dB
IM3
VOUT = 1.5VP-P, 40dB < gain < 60dB (Note 1)
-54
dBc
IF OVERLOAD DETECTOR (see the IF Overload Detector section)
Output Overload Attack Point
Attack-Point Accuracy
0.7
VP-P
±1
dB
Detector Output Voltage Range
Negative polarity, overload reduces VDET
(open collector, 0.3mA sink)
0.5
3.0
V
Detector Gain
70
V/V
FREQUENCY SYNTHESIZER
REFERENCE OSCILLATOR
Frequency
4
MHz
DIVIDERS
RF N-Divider Ratio
256
32,767
RF R-Divider Ratio
8
127
LO PHASE DETECTOR AND CHARGE PUMP
Comparison Frequency
31.50
250.00 kHz
CP = 00
0.5
Charge-Pump Current
CP = 01
CP = 10
1
mA
1.5
CP = 11
2
Charge-Pump Three-State Current
±5
nA
Charge-Pump Current Matching
5
%
LOCAL OSCILLATOR (OSCILLATOR WITH NARROW BAND LOOP)
VCO Tuning Range
Tank frequency
2160
4400 MHz
VCO Tuning Gain
Tank oscillator gain
500 MHz/V
2-WIRE SERIAL INTERFACE
Clock Frequency
400
kHz
Note 1: Guaranteed by design and characterization.
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